“Dies a Quo of the Revised Disability Pension, Qualified Total Permanent Disability in Situations of Reciprocal Calculation of Contributions and Reduction Coefficient in Early Retirement through Employment Regulation File (good Harvest for a Teacher)”. Revista de Derecho de la Seguridad Social, Laborum, Aug. 2021, pp. 101-7, https://revista.laborum.es/index.php/revsegsoc/article/view/480.